725128412 has 24 divisors (see below), whose sum is σ = 1316330400. Its totient is φ = 349102656.

The previous prime is 725128399. The next prime is 725128427. The reversal of 725128412 is 214821527.

725128412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×725128412² = 1051622427779283488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34889 + ... + 51647.

It is an arithmetic number, because the mean of its divisors is an integer number (54847100).

Almost surely, 2^725128412 is an apocalyptic number.

It is an amenable number.

725128412 is a deficient number, since it is larger than the sum of its proper divisors (591201988).

725128412 is a wasteful number, since it uses less digits than its factorization.

725128412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17165 (or 17163 counting only the distinct ones).

The product of its digits is 8960, while the sum is 32.

The square root of 725128412 is about 26928.2084810706. The cubic root of 725128412 is about 898.4039250770.

Adding to 725128412 its reverse (214821527), we get a palindrome (939949939).

The spelling of 725128412 in words is "seven hundred twenty-five million, one hundred twenty-eight thousand, four hundred twelve".